నైరూప్య

Behaviour of Concrete on Replacement of Sand with Quaries Stone Dust as Fine Aggregate

A. Suribabu, Dr U.Rangaraju , Dr.M. Ravindra Krishna

River sand is most commonly used fine aggregate in the production of concrete poses the problem of acute shortage in many areas. Quarry rock dust can be an economic alternative to the river sand. Quarry Rock Dust as 100% substitutes for Natural Sand in concrete. Mix design has been developed for M25 and M40 grades using design approach IS for both conventional concrete and quarry dust concrete. Tests were conducted on cubes and beams to study the strength of concrete made of Quarry Rock Dust and the results were compared with the Natural Sand Concrete. It is found that the compressive and flexural strength of concrete made of Quarry Rock Dust are nearly 10% more than the conventional concrete. Tests were also conducted on cubes and beams which are exposed to temperatures of 300°C for 1hr, 3hr durations respectively